What does the word undersell mean?

Usage examples for undersell

  1. Not only must our labor be protected by the tariff, but it should also be protected so far as it is possible from the presence in this country of any laborers brought over by contract, or of those who, coming freely, yet represent a standard of living so depressed that they can undersell our men in the labor market and drag them to a lower level. – Complete State of the Union Addresses from 1790 to the Present by Various
  2. We could not continue to produce articles cheaper than England or Germany, and undersell these countries in their home markets. – American World Policies by Walter E. Weyl